Disk harrow angling arm



oct. 2l, 1952 w- P, OEHLER 2,614,377

DISK HARROW ANGLING ARM Filed Aug. 28, 1948 2 SHEETS- SHEET 2 INVENTOR.

WILLIAM P. OEHLER A RNEYS Patented Oct. 21, 1952 :UNITED PATENT voRF.lcl

DISK EHARROW AN ABM William fPJOehler, Moline, liffassignonto' Deere Compa/nmfMdine, :tz-corporationof Illi- '-*Tihe present invention Vrelates generally -to agricultural implements and more particularly to disk -harrows ofi theA typevshown in' U.-S; Patent 2 ,339,124; issued J anuary 11g-:1944;-to- Charles White.

The' object Va-ndgenera-l--nature -Y of thefpresent invent/ion is the provision ofV a-newf` andimproved frame' constructionJ -for disk A'harrows'of the type referred to. More particularly; -it is aeature-of thisinvention to provide -an'improveddouble actionldi'skfharrow in w-liiich'fthe'f-roritfand` rear gangsare connected togethenby new-and simplifled 'linkage='.which constitutes a-n V4improvement over the 4eor-istruction ishown-in V the :abo-veementioned White patent. 'Mo-re:speei1cal1y,it is a teaturewof thisi invention -to `.providean angling arm "for =each of. the `firent :and-'rear diskf gangs whichzalso.serve-firstpas a'reenforcinghrace for the inner :endof the associatedfgang. frame and, second, asa-:support for.A thetassociated `uptlirustresistingrspring means. .,Further, itz-iszaieature of i'. this;imrentionl ltor` providegnewsand improved angling linkage ,between .the front andv rear gangs which is 1 so yconstructed; andgarranged that; right and left hand parts are eliminated, hotnfront anglingarms being identical; and likewise the rear .angling v:arms are identical.. This materially facilitates; the. manufacturefand: assemblyofthe harrow- -These and other .objects and :advantages of thefpresent Iinvention will befapnarent';torinese skilled the artafter a1wnsicieratio-nv` -of the following detailed description.:takenin :conjunction-within@ accompanying ldrawv.ing.s., inwhich:

Figure lis-apartialplan view of atandem disk harrowin whichthepriniples of the, pres- .ent .invention .have been-incorporated.

-Eigure. 2 is ,ajggenerally vertical-sectional ,view .iakenalong the 1ine'2-f2oiFisurei.

Eisma 3 itsy a sectional View .taken-aime .the liiieS-B o .f Figure 1.

Referring firstf'toFgune 1, 4the disk harrcwv` in which .'ihezprinciples A.olf the present invention hare:beenincorporatedisaof `the typezshownand claimedvinzthe l:abovementioned:patent andV indudes vxaxgnain; frame j .to fthe, forward: portion of #which z aupar; of Arightriandleft fdisk gangs. 12 and: `3 areaswingablyrconnected. A :pairnof rear -ghtrrfandl'left hand :gangs .4 gand i5:.ar.e swingablymonnectewiththe rearportion .of the frame l. Each of the front gangs -includesagang frame 6i having-iront andtv reanangle lhars 1.A and.k 8 connectedvtogether-:at theirV outer ends by -an end sectionisf andati-their. innemends by an angling armwandfbrace member? 11| "Thef rear .portionnof Y2 the latter@isfreenforcedfiby aifbracef: |f2 xext rielin-g from thel reary end offthefarmfll outwardlyHand forwardly v.tothe Y outer lend portion of i 'the-rear angleff. f- Similarly! each of` thef rear disk gangs 4 -and- 5 includes airamel yI 3 which isf-made up-of a front-angle I4,=-afrear angieilam -outerfend section l-G i and .a combined-brace and angl-ingarm I 1 .which'l-is'- -reenforoedvbyifai brace I lfbolilessi.v at its f forward end toi the` lor-ward Yportion i* of Ythe member l1 `and at -its rearf-end stoffthe ou-ter portion -of-V thev associated forwardf frame'angleill 4.

`The -left Yhand iront f-and tea-r -jgangs ifiand L5 are interconnected b-y-a Llink l-9==wnich is pivot-.- ally connectecliat its 'forward or?laterally inner end to then-ear endf-offthe arm |.I- and'fat-.its outer or'rear end: tothe forward-endof-the-arm l1. Anlink I-9 also'connectsthe.-angling:arms of the'irontfandrearrghthandfgangs and 4. A hitch 2ll,f-of-conventional construction -soffareas the 4`present invention islconcernecl, is=conneeted With the' yfront -end= -of' the fr-ame- Land the" iront gangs' 2 and-'f3 andii-ncorporates 9, maint-draft structure D2 l f and 'rearwardly' and laterally outwardly extending-angling llinks 2 band-123 which are Ypivotall-y-connected atfitheir-rearaends -to the outer portions offthefassociated gangframe'. The forward en'dsof the links f22- andi 2 3-are connectedl to a controllable slide? '2 4 movablymounted on the front portionf-of-'f'ithez-mainlidraftwmember 2 l li'oren and-aft movementoff thef'slide 24; rela tive to Ithefront portion Vofthe draft-Joarfll, serves to :shift "the front gangs o2 V:and 33 i-into and out of angled-workingipositiomwandzwwhen the '.harrow'l' is turned iftghe iateral swinging of the drawbar `structure 2 l.: actsthroughnthel links 22 .and 23 *toV reduce.- the tangle. iofithediskfgang onI lthe" insideofrfthe turn-r and .increasei-,thecaingle of thefdisk gang-onithe outsidef'of :theiturn thereby to facilitate :makingft-henturn.

"Each oftheffront and rear. gangs.z2,;3 andre-4:15 includes a plurali-tysof :disks 2 26 i mounteduon;I a gang bolt 21 andare held?Linpropenspacedrela tion` by. spacing-.spools 2 8, as zin conventional' con.- struction. *The innerfendof each'- ofi.the1."front gangs-2 and 31fis providedy Withi-arpair-Lof bearing `brackets 3 Ii twhich are'fbo'lted at'lth'eir. upper-fand outer ends to thefrontzand rear: frame Langlesli'l and'i 8 and .at -Vtheir i inner.: and lower =.ends:to ,j a bearing structure 133 vwhich receives-then spool at thai-nner endl ofthe Lrontgigang bolt121f-on which the :disks-2 6 4are mounted. '.Theouteriend of each gang bolt* 2 1 lis# rotatably `-rnounted im-an outer bearing 3 6 *xed to 'theg-g-a-ng `frasne-i61f=by bearing brackets 31. Preferabl tlfiejiorw-ard portionfa of eaehirontlfbearn'g braeketahextends forwardly of the frame angle 1 and is formed to pivotally and swingably receive the rear end of the associated draft link, 22 or 23. Each of the inner bearings 33 is provided with an upwardly extending socket 39 which receives the associated downwardly extending portion of the main frame. The inner bearings 33 and associated parts are so constructed and arranged that the front gangs may swing both in a fore and aft direction and in a vertical direction, as when passing over uneven ground. The rear gangs Il and are of substantially identical construction, so far as the bearings, disks and bearing brackets are concerned, and hence the sailvv reference numerals have been used for corresponding parts.

Referring now more particularly to Figure 2, the front combined spring support, gang frame brace and angling arm member II comprises an upwardly arched section 4I which is centrally apertured, as at 42, and which terminates in front and .rear flat portions 43 and 44. The latter portions are apertured to receive bolts 45 and 45 which fasten the ymember rigidly to the front and rear frame angles 1 and 6. Rearwardly of the arched portion li-I the member Il includes a downwardly offset portion 41 the rear flat or straight portion 138 of which is provided with a forward aperture 9 and a rear set of four apertures 5I. As best shown in Figure 1,` it will be seen that the member Il is .symmetrical about its longitudinal vertical plane so that the right and left hand members Il are identical. The front and rear frame angles 'I and 3 are apertured, as at 53 and 5t to receive the bolts 45 and 46 and the openings 53 and 54 are so placed that when the narrow is in its transport position, with the front and rear disk gangs straightened, the front angling arm members II, particularly the rear portion containing the plurality of apertures 5I, is disposed in a line which is tangent to the arc of movement of the associated connecting link I9 when the latter is disposed in one of the intermediate openingsv V5I, as shown in dotted lines in Figure l. The forwarder laterally inner end of the link I9 is adapted to be pivotally connected to the angling arm section 4'! in any one of a number of different positions by means of a bolt 57 which is disposable in any one of the openings 5I. A pivot bolt 58 connects the rear orouter end of the link I9 to the forward end of the associated rear angling arm II.

Referring now to Figure 3, the rear angling arm member I'I is constructed similarly to the forward arm'member II. Specifically, the rear angling arm member I1 comprises a rear arched section 6I having a single central aperture S2 and terminating in a forward at or straight portion 63 and a rear at or straight portion 54, both apertured to receive bolts 65 and 66 which fasten the archedsection EI to the front and rear frame. angles I4 and I5 and the associated disk gang. Forwardly of the arched section 6I, the angling arm Lmember I'I includes a downwardly offset portion S1 which is apertured at 58 and 69. The associated rear brace I8 is connected to the offset section SI by a vbolt 'II which passes Athrough the` aperture 68.

The outer end of the brace IB is connected by a bolt I2 or the like to the associated front frame angle I4. The-otherapertureV 69 in the downwardly offset portionG'I receives the pivot bolt 53 which connects the outer end'of Ythe interconnecting link I9 to the arm member I'I. The arm 4 members I1 connected to the right and left hand rear gang frames are of identical construction, being symmetrical about their vertical longitudinal plane, and hence during assembly it is immaterial whether any one arm member I'I is fastened to the left hand gang frame or the right hand gang frame.

The front arch sections 4I of the forward arm members II and the rear arch sections 6I of the rear arm members I'I serve not only as cross braces for the inner ends of the gang frames but also ,as supports for the spring units acting against the gang frames t0 prevent upthrust of the gangs due to soil pressure against them. To serve as spring supports, the front arch sections III have pairs of apertures 2 spaced apart to receive the bases of a pair of spring brackets 8i. the inner or upper ends of which are interconnectedacross the frame I by a tension spring unit 32. The rear arch sections 6I are apertured,A as at 62, to receive the outer ends of spring biased rod members 84 which at their inner ends are slidably mounted in brackets 85 which are held in place by bolts 86 which secure the two frame members 8l and 88 together. The members 81 and 88 constitute laterally inwardly directed extensions of a pair of frame bars QI and 92, which form the rear section S3 of the main frame I, the forward section 9d 'of which is releasably connected, as at 97, to the forwardV end of the rear section 93.V The present invention is not particularly concerned .with the details per se of the frame construction or the upthrust resisting spring means except toform supports for the latterunits.

While Ihave shown and described above the preferredl structure in whichthe Vprinciples of the present invention have been incorporated, it is to be understood that my invention is not to be limited to the particular details shown and described above but that, in fact, widely different means may be employed in the practice of the broader aspects of my invention..

What I claim and desire to secure by Letters Patent is:

l. In a tandem disk harrow of the type having a main frame, pairs of front and rear gangs swingably connected therewith, each gang of the pair of rear gangs including a gangframe l having front and rear bars, and means for swinging the front gangs relative to themain frame, interconnecting means connecting the rear gangs with the front gangs comprising a combined angling arm and spring support connected to each pair of the front and rear bars of the rear gangs, each combined angling arm and spring support including a section disposed adjacent the laterally inner ends of the front and rear bars of theA associated gang and having', between said bars, an upwardly extended portion, disk gang thrust-resisting spring means connected between the upwardly extending portions of said combined angling armand spring's'upports, each of said combined angling arm and spring supports also includingY a portion forming a generally forwardly directed angling arm portion, each of Vsaid combined angling arm and spring supports being symmetrical about a verti-' cal'longitudinal plane and each having at the forward end of its angling arm portion a linkreceiving aperture disposed'in said'plane, ra pair of bars rlXed to the front gangs and'extending rearwardly therefrom, av'link pivotally connected to the forward end of each of.said combined angling armand springv supports at ,the opening y in said angling portion thereof, and means for pivotally connecting the lateral inner ends of said links with the rear ends of said bars.

2. In a tandem disk harrow of the type having a main frame, pairs of front and rear gangs swingably connected therewith, each gang of the pair of front gangs including a gang frame having front and rear bars, and means for swinging the front gangs relative to the main frame, interconnecting means connecting the rear gangs with the front gangs comprising. a combined angling arm and spring support connected to each pair of the front and rear bars of the front gangs, and each combined angling arml and spring support including a section disposed adjacent the laterally inner ends of the front and rear frame bars of the associated gang and having, between said bars, an upwardly extending portion, disk gang thrust-resisting spring means connected with the upwardly extending portion of each of said combined angling arm and spring supports, each of the latter including a portion forming a generally rearwardly directed angling arm, each of said combined angling arm and spring supports being symmetrical about a vertical longitudinal plane and each having at its rear end a link-receiving aperture disposed in said plane, a pair of bars fixed to the rear gangs and extending forwardly, to form a generally forwardly directed angling arm, a link pivotally connected to the forward end of each rear angling arm portion and extending laterally inwardly therefrom, and means for pivotally connecting the inner ends of said links with the combined angling arm and spring supports, respectively, at said apertures in the rear ends thereof.

3. In a tandem disk harrow, frame means, pairs of front and rear disk gangs swingably 6 connected atv their inner ends to said frame means, each gang including a gang frame having front and rear bars, a combined angling arm land spring support connected to each pair of front and rear bars and including a section disposed adjacent the laterally inner ends of said front and rear bars and serving as a brace reenforcing said bars, said section including, an upwardly extending portion, disk gang up-thrust resisting spring means connected with the upwardly extending portion of each of said brace sections, each'combined angling arm and spring support connected with said front gangs including a rearwardly extending angling arm section and each combined langling arm and spring support being symmetrical about a vertical longitudinal plane, and each rearwardly extending arm section having a link-receiving vaperture lying in said plane of symmetry, each combined angling arm and spring support connected with said rear gangs including a forwardly extending angling arm section, each rear angling arm and support being symmetrical about a vertical longitudinal plane and each forwardlyY extending arm section having a link-receiving aperture lying in said latter plane of symmetry, and link means at each side of the harrow interconnecting the` forwardly and rearwardly extending angling arm sections at said apertures.

WIILIAM P. OEHLER.

REFERENCES CITED vThe following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,262,908 Young Nov. 18, 1941 2,339,124 White Jan. 11, 1944 

